Speaker
Description
In the context of a research project conducted at the Teatro Comunale di Ferrara concerning the assessment of vibrations induced by amplified music events, particularly their impact on delicate architectural elements, this study investigates the dynamic response of the hall’s ceiling, assessing its contribution to the hall's overall acoustics. An experimental vibro-acoustic analysis was conducted by measuring sound pressure levels in the hall and vibration levels on the ceiling, induced by either an airborne sound source or impact excitation on the ceiling structure. Furthermore, acoustic and structural reverberation times were measured respectively in the room and on the ceiling. Experimental observations indicate that the influence of the ceiling on the hall's acoustics may be only substantial at very low frequencies. For a deeper investigation, a hybrid model was implemented to analyse this vibro-acoustic interaction. This approach utilised numerical Finite Element (FE) analysis for low frequencies and Statistical Energy Analysis (SEA) for mid-to-high frequencies. The model results were finally validated against a different set of experimental data.